The icon is an outline of a bell. It is the normal bell shape with a small circle on the top. There is a slightly bigger circle at the bottom that is supposed to be partially inside the bell.

This page contains the Notification vector icon, as well as variations of this icon in different visual styles, and related icons. All icons are in the flat vector style, however, differ by the line thickness, fill, and corner radius.

Idea of Notification Icon by Mark

We've received the idea on November 26, 2012 and created the icons on February 24, 2013

A set of icons for viewing a calendar/schedule, appointment reminders, recurring appointment icon, "show as" icon, categorize icon, along with priority icons (high, low and private). See this screenshot for concepts: